Adds password regular expression checks to doctor
Adds password regular expression checks to doctor

This patch adds checks to doctor. Checks if the password regular
expression is valid. Also, if password regular expression is set, checks
if the description is set.

Depends-On: Ibdef927aec4fd2a628ddb3e438f2fe34082e9ac1
Change-Id: Id4123b6a126aa57a672c5ae0428c1c5cef81cbbf

mahak/keystone,rajalokan/keystone,mahak/keystone,ilay09/keystone,rajalokan/keystone,openstack/keystone,ilay09/keystone,openstack/keystone,ilay09/keystone,mahak/keystone,rajalokan/keystone,openstack/keystone